Question

The radii of two cylinders are in the ratio 2:3 and their heights are in the ratio 5:3.calculate the ratio of their total surface areas

Answer 1

Answer:

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Answer 2

hey dear❤️

Let the radii be 2x and 3x,

let the height be 5y and 3y.

so, ratio of volume =r²h/R²H

=(2x)²×5y/(3x)²×3y

=20x²y/ 27x²y

=20/27

ratio of TSA =rh/RH

=2x×5y/3x×3y

=10xy/9xy

=10/9.

Volume will be 20:27

TSA will be 10:9